The factory rubber rear upper shock mount for the NC MX-5 Miata chassis relies on rubber bushings to provide articulation. They wear out over time, can dry crack, even come apart completely. The worst part is - even when these mounts are new they have a lot of slop and "slow down" damper reactions to vertical inputs in the shocks. We can fix all of that.
Vorshlag has been making spherical shock mounts for over two decades for a variety of chassis: BMW, Corvette, Miata, 86, and more. These mounts specifically for the the NC are made in house here at Vorshlag and feature our oversized spherical bearing you'll find in our camber plates.
As you can see above, we want to replace is the factory "rubber bushing sandwich" that the OEM dampers are secured with, without going to a shorter spherical top mount we have seen others sell - which have less total damper stroke.
Our solution allows the use of the aluminum shock mount towers but with a proper spherical bearing instead of the old rubber double whammy. The threaded bearing housing uses our massive 19mm ID, stainless steel, Teflon lined spherical bearing, which is then threaded into the modified OEM shock mount, with a special threaded upper ring to secure it in place.
These shock mounts are beefy, and as strong as a tank. They can be adapted to most rear shocks. Removing the rubber bushings from the top mounts and replacing them with spherical mounts will improve suspension articulation and movement.
NOTE: This Vorshlag shock mount is made for a "pin mount" shock, as shown in these pictures. One with an upper shock stem, not an upper shock "eye", which would require a clevis mount adapter.
We have drop-down options for known shock stem profiles. We can also configure our rear shock mounts for virtually any coilover damper, with some information you provide. Please see the sections below to help us build your set properly for a noise-free, perfect fit.
Our spherical bearing insert is added to new, machined aluminum stock housings. We buy these in bulk and modify them to accept the threaded insert in-house.
UPPER STEM DIAMETER: These shock mounts are designed to work with virtually any rear shock. We use different upper and lower bushings (spool pieces) to adapt the big 19mm ID of our spherical bearing to the shaft sizes of the very top of the rear shock. YOU have to tell us how to build your shock mount assembly by picking the proper upper stem diameter of your rear shocks at the drop down menu below.
The part we need to know from you is the very top - which will have a 10mm/M10 threaded or a 12mm/M12 threaded upper shaft stem. Typically an OEM or non-adjustable shock has a 10mm shaft and an adjustable aftermarket shock has a 12mm shaft. The shock mount sits on the shoulder or step where it goes from the big diameter and necks down to the small upper stem diameter. See the images below for a better explanation. If you are unsure about shock shaft upper stem option to choose, please email or call us.
